Blade self-adjusting structure of wind power generation equipment

Abstract

The invention discloses a blade self-adjusting structure of wind power generation equipment, and relates to the technical field of wind power generation, the blade self-adjusting structure of the wind power generation equipment comprises a hub, an adjusting assembly, a controller and at least three blades, each blade is rotatably arranged on the hub, and each blade is provided with a sensor module; the adjusting assembly comprises a driving part and a planetary gear synchronizing mechanism, and the driving part is arranged on the hub; the planetary gear synchronizing mechanism is arranged on the hub and connected with the output end of the driving part, the controller is used for obtaining detection data of the sensor module and controlling the driving part to operate according to the detection data, and the driving part drives the blades to rotate synchronously through the planetary gear synchronizing mechanism so as to adjust the pitch angles of the blades. According to the technical scheme, the technical problems that wind power generation equipment is low in power generation efficiency under the condition of low wind speed and is prone to structural damage under the condition of high wind speed can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a blade self-adjusting structure of a wind power generation device. Background Art

[0002] Wind turbines, devices that convert wind energy into electricity, are a crucial component of renewable energy technology. They capture the kinetic energy of the wind, rotating blades that then drive generators to generate electricity. However, traditional wind turbines suffer from technical issues such as low power generation efficiency at low wind speeds and structural damage at high wind speeds.

[0003] Therefore, it is necessary to provide a new blade self-adjusting structure for wind power generation equipment to solve the above technical problems. Summary of the Invention

[0004] The main purpose of the present invention is to provide a blade self-adjusting structure for wind power generation equipment, aiming to solve the technical problems of low power generation efficiency at low wind speeds and easy structural damage at high wind speeds in wind power generation equipment.

[0005] To achieve the above-mentioned objectives, the present invention proposes a blade self-adjusting structure for a wind power generation device, comprising:

[0006] wheel hub;

[0007] at least three blades, each blade being rotatably disposed on the hub, and each blade being provided with a sensor module;

[0008] An adjusting assembly, the adjusting assembly comprising a driving member and a planetary gear synchronization mechanism, the driving member being disposed on the wheel hub; the planetary gear synchronization mechanism being disposed on the wheel hub and connected to an output end of the driving member;

[0009] A controller is used to obtain detection data from the sensor module and control the operation of the driving member according to the detection data. The driving member drives each of the blades to rotate synchronously through the planetary gear synchronization mechanism to adjust the pitch angle of each blade.

[0010] In one embodiment, the planetary gear synchronization mechanism includes a ring gear, a sun gear, a planet carrier and at least two planetary gears, the ring gear is arranged on the wheel hub, the sun gear is arranged in the ring gear and is connected to the output end of the driving member through a first rotating shaft, each of the planetary gears is simultaneously engaged with the outer tooth surface of the sun gear and the inner tooth surface of the ring gear, the planet carrier is rotatably connected to each of the planetary gears, and the planet carrier is provided with bevel teeth, each of the blades is provided with a bevel gear, and each of the bevel gears is engaged with the bevel teeth.

[0011] In one embodiment, there are three planetary gears, and the three planetary gears are simultaneously engaged with the outer tooth surface of the sun gear and the inner tooth surface of the ring gear.

[0012] In one embodiment, the adjustment assembly further comprises a driving mechanism, the hub is provided with a mounting plate, the driving mechanism is arranged on the mounting plate, and the driving mechanism can drive the blade to rotate through the planetary gear synchronization mechanism to adjust the pitch angle of the blade;

[0013] Definition: The adjustment accuracy of the driving mechanism driving the blades to rotate through the planetary gear synchronization mechanism is A, and the adjustment accuracy of the driving member driving the blades to rotate through the planetary gear synchronization mechanism is B, then: A>B.

[0014] In one embodiment, the driving mechanism includes a driving body, a turbine, a worm, a mounting block and a self-locking unit, the driving body is arranged on the mounting plate, the turbine is rotatably arranged on the mounting plate through a second rotating shaft, the worm is arranged at the output end of the driving body and engages with the turbine, the mounting block is arranged on the second rotating shaft, and the self-locking unit is arranged on the mounting block; a portion of the self-locking unit can be inserted into the sun gear to lock the relative position of the sun gear and the mounting block.

[0015] In one embodiment, the mounting block is provided with a receiving hole, the sun gear is provided with a pin hole, and the self-locking unit includes an electromagnet and an insert block, the electromagnet and the insert block are both received in the receiving hole, and the electromagnet can drive the insert block to be inserted into or removed from the pin hole;

[0016] The controller can control the electromagnet to lose power so that the insert block is inserted into the pin hole; the controller can also control the electromagnet to gain power so that the insert block is separated from the pin hole.

[0017] In one embodiment, the self-locking unit further includes a reset member disposed on the outside of the electromagnet; one end of the reset member is connected to the bottom surface of the accommodating hole, and the other end is connected to the insert block, and the reset member can drive the insert block to move in a direction away from the electromagnet to be inserted into the pin hole.

[0018] In one embodiment, the planetary gear synchronization mechanism includes a ring gear, a sun gear, a planet carrier and at least two planetary gears, the sun gear is arranged on the wheel hub; the ring gear is movably arranged on the wheel hub and is connected to the output end of the driving member by gear meshing, each of the planetary gears is simultaneously meshed with the outer tooth surface of the sun gear and the inner tooth surface of the ring gear, the planet carrier is rotatably connected to each of the planetary gears, and the planet carrier is provided with bevel teeth, each of the blades is provided with a bevel gear, and each of the bevel gears is meshed with the bevel teeth.

[0019] In one embodiment, the sensor module includes at least one of a strain gauge and an anemometer.

[0020] In addition, the present invention also provides a wind power generation equipment, comprising the blade self-adjusting structure of the wind power generation equipment as described above.

[0021] The technical solution of the present invention utilizes a drive element to rotate the blades, thereby adjusting the blade pitch angle and, consequently, the blade angle of attack. This improves the wind turbine's power generation efficiency at low wind speeds and reduces the likelihood of structural damage at high wind speeds. Furthermore, by providing a planetary gear synchronization mechanism to synchronize the blades, the blades can be rotated synchronously, reducing the size of the wind turbine, minimizing energy loss, and improving power generation efficiency. In this embodiment, the hub serves as a support structure for mounting the various components of the blade self-adjusting mechanism. A sensor module is used to detect various operational data of the wind turbine and transmit the detected data to a controller to provide data support. The detected data includes at least one of wind speed, wind direction, force, and acceleration. An adjustment assembly is used to rotate the blades to adjust their pitch angle. Specifically, the adjustment assembly includes a drive element and a planetary gear synchronization mechanism. The drive element drives the blades to rotate synchronously via the planetary gear synchronization mechanism. Specifically, when the wind turbine is operating at low wind speeds, the controller acquires detection data from the sensor module and controls the operation of the drive element based on the detection data. The drive element drives the blades counterclockwise or clockwise through a planetary gear synchronization mechanism to increase the blade pitch angle and reduce the blade angle of attack, thereby increasing the wind energy captured by the blades and improving power generation efficiency. When the wind turbine is operating at high wind speeds, the controller acquires detection data from the sensor module and controls the operation of the drive element based on the detection data. The drive element drives the blades clockwise or counterclockwise through a planetary gear synchronization mechanism to reduce the blade pitch angle and increase the blade angle of attack, thereby reducing the force on the blades and reducing the possibility of structural damage to the blades and the wind turbine due to excessive force. In addition, the drive element of the blade self-adjusting structure drives the blades to rotate synchronously through a planetary gear synchronization mechanism. The planetary gear synchronization mechanism has the characteristics of load balancing, compact structure and high transmission efficiency, which can ensure the synchronous rotation of all blades and avoid phase deviation caused by single-point drive. At the same time, it can also reduce the volume of the wind turbine, reduce energy loss, and thus improve power generation efficiency. The blade self-adjusting structure of the wind power generation equipment is applied to the technical fields of wind power generator sets, equipment that uses wind power to generate electricity or drive, and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 A schematic structural diagram of a blade self-adjusting structure of a wind power generation device according to an embodiment of the present invention;

[0024] Figure 2 A cross-sectional view of a blade self-adjusting structure of a wind power generation device according to an embodiment of the present invention;

[0025] Figure 3 for Figure 2 A magnified view of point A in the figure;

[0026] Figure 4 This is a planetary gear synchronization mechanism in one embodiment of the present invention.

[0027] Description of Figure Numbers:

[0028] 100. Hub; 110. Mounting plate; 200. Adjustment assembly; 210. Drive member; 220. Planetary gear synchronization mechanism; 221. Ring gear; 222. Sun gear; 2221. First rotating shaft; 2222. Pin hole; 223. Planet carrier; 2231. Conical teeth; 224. Planetary gear; 230. Drive mechanism; 231. Turbine; 2311. Second rotating shaft; 232. Worm; 233. Mounting block; 2331. Accommodation hole; 234. Self-locking unit; 2341. Electromagnet; 2342. Insert block; 2343. Reset member; 400. Blade; 410. Bevel gear.

[0029] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that meet both A and B.

[0033] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] Wind turbines are devices that convert wind energy into electrical energy and are an important component of renewable energy technology. During the actual research and development process, researchers found that the blades of traditional wind turbines are mostly fixed structures, that is, the blades are rigidly connected to the hub. This makes it impossible to adjust the pitch angle of the blades, which in turn makes it impossible to actively control the angle of attack of the blades of the wind turbine. Specifically, at low wind speeds, blades with fixed pitch angles often find it difficult to achieve the optimal angle of attack, which reduces the kinetic energy of the wind captured by the blades and affects the power generation efficiency of the wind turbine. At high wind speeds, blades with fixed pitch angles cannot limit power output by adjusting the angle of attack, which can easily cause mechanical vibration and structural fatigue, causing structural damage to the wind turbine.

[0035] The present invention proposes a blade self-adjusting structure for a wind power generation device, aiming to solve the technical problems of low power generation efficiency at low wind speeds and easy structural damage at high wind speeds in wind power generation devices.

[0036] See also Figure 1 and Figure 2In one embodiment of the present invention, a blade self-adjusting structure of a wind power generation device includes a hub 100, an adjustment assembly 200, a controller, and at least three blades 400. Each blade 400 is rotatably disposed on the hub 100, and each blade 400 is provided with a sensor module. The adjustment assembly 200 includes a driving member 210 and a planetary gear synchronization mechanism 220. The driving member 210 is disposed on the hub 100; the planetary gear synchronization mechanism 220 is disposed on the hub 100 and connected to the output end of the driving member 210. The controller is used to obtain detection data from the sensor module and control the operation of the driving member 210 based on the detection data. The driving member 210 drives each blade 400 to rotate synchronously through the planetary gear synchronization mechanism 220 to adjust the pitch angle of each blade 400.

[0037] The technical solution of the present invention, by providing a driving member 210 to drive the blades 400 to rotate, can adjust the pitch angle of the blades 400, and thus adjust the angle of attack of the blades 400, thereby improving the power generation efficiency of the wind turbine under low wind speed conditions and reducing the possibility of structural damage to the wind turbine under high wind speed conditions. At the same time, by providing a planetary gear synchronization mechanism 220 to achieve synchronous movement of each blade 400, it can ensure the synchronous rotation of the blades 400, reduce the volume of the wind turbine, reduce energy loss, and improve power generation efficiency. In this embodiment, the hub 100 serves as a support structure for mounting the various components of the blade self-adjusting structure. The sensor module is used to detect various data during the operation of the wind turbine and can transmit the detection data to the controller to provide data support for the controller; the detection data includes the stress and wind speed experienced by the blades 400. The adjustment assembly 200 is used to drive the blades 400 to rotate so as to adjust the pitch angle of the blades 400 ; specifically, the adjustment assembly 200 includes a driving member 210 and a planetary gear synchronization mechanism 220 , and the driving member 210 drives each blade 400 to rotate synchronously through the planetary gear synchronization mechanism 220 . Specifically, when the wind power generation equipment is operating at low wind speed, the controller obtains the detection data of the sensor module and controls the operation of the driving member 210 according to the detection data. The driving member 210 drives the blades 400 to rotate counterclockwise or clockwise through the planetary gear synchronization mechanism 220 to increase the pitch angle of the blades 400 and reduce the angle of attack of the blades 400, thereby increasing the wind energy that the blades 400 can capture and improving the power generation efficiency; when the wind power generation equipment is operating at high wind speed, the controller obtains the detection data of the sensor module and controls the operation of the driving member 210 according to the detection data. The driving member 210 drives the blades 400 to rotate clockwise or counterclockwise through the planetary gear synchronization mechanism 220 to reduce the pitch angle of the blades 400 and increase the angle of attack of the blades 400, thereby reducing the force on the blades 400 and reducing the possibility of structural damage to the blades 400 and the wind power generation equipment due to excessive force. Furthermore, the drive element 210 of the self-adjusting blade structure drives the blades 400 to rotate synchronously via the planetary gear synchronization mechanism 220. The planetary gear synchronization mechanism 220 features balanced load distribution, a compact structure, and high transmission efficiency. This ensures the synchronous rotation of all blades 400, avoiding phase deviations caused by single-point drive. Furthermore, it reduces the size of the wind turbine, reduces energy losses, and thus improves power generation efficiency. The self-adjusting blade structure of this wind turbine has applications in wind turbines, equipment that utilizes wind power for power generation or drive, and other technical fields.

[0038] It should be noted that the pitch angle of blade 400 refers to the angle of rotation of blade 400 about its axis of rotation, that is, the inclination angle of blade 400 as a whole relative to the plane of rotation; the angle of attack of blade 400 refers to the angle between the airflow direction and the chord line of the airfoil of blade 400. When the pitch angle of blade 400 increases, blade 400 becomes more parallel to the plane of rotation, thereby reducing the actual angle of attack of the airflow relative to the airfoil and, in turn, reducing the angle of attack of blade 400; and vice versa. In one specific embodiment, the number of blades 400 is three. Alternatively, the number of blades 400 may be four, five, or the like.

[0039] See also Figure 2 and Figure 4 In one embodiment of the present invention, the planetary gear synchronization mechanism 220 includes a ring gear 221, a sun gear 222, a planet carrier 223, and at least two planetary gears 224. The ring gear 221 is mounted on the hub 100, and the sun gear 222 is mounted within the ring gear 221 and connected to the output end of the driver 210 via a first rotating shaft 2221. Each planetary gear 224 engages with both the outer tooth surface of the sun gear 222 and the inner tooth surface of the ring gear 221. The planetary carrier 223 is rotationally connected to each planetary gear 224 and is provided with bevel teeth 2231. Each blade 400 is provided with a bevel gear 410, and each bevel gear 410 engages with the bevel teeth 2231. In this embodiment, the driver 210 drives the blades 400 to rotate synchronously via the planetary gear synchronization mechanism 220. The planetary gear synchronization mechanism 220 effectively disperses torque through multiple contact points, reducing the impact of blade 400 vibration on the wind turbine, thereby reducing the possibility of structural damage to the wind turbine. The planet carrier 223 drives each blade 400 to rotate by cooperating with the bevel teeth 2231 and the bevel gear 410. This can convert the rotation of the planet carrier 223 about the front-rear axis into the rotation of the blades 400 themselves, thereby adjusting the pitch angle of the blades 400. It can also improve the accuracy of the driving member 210 when driving the blades 400. Specifically, the driving member 210 drives the sun gear 222 to rotate via the first rotating shaft 2221. Because the ring gear 221 is fixedly mounted to the hub 100, the planet gears 224 will simultaneously rotate around the sun gear 222 and drive the planet carrier 223 to rotate. Subsequently, the planet carrier 223 drives the blades 400 to rotate, thereby adjusting the pitch angle of the blades 400.

[0040] See also Figure 4 In one embodiment of the present invention, there are three planetary gears 224, which simultaneously mesh with the outer teeth of the sun gear 222 and the inner teeth of the ring gear 221. In this embodiment, by setting the number of planetary gears 224 to three, the load is evenly distributed, reducing unbalanced loads and vibration, and ensuring the stability of the blades 400 during rotation and the operation of the wind turbine.

[0041] See also Figure 2 and Figure 3 In one embodiment of the present invention, the adjustment assembly 200 further includes a drive mechanism 230. The hub 100 is provided with a mounting plate 110. The drive mechanism 230 is mounted on the mounting plate 110. The drive mechanism 230 can drive the blades 400 to rotate via the planetary gear synchronization mechanism 220 to adjust the pitch angle of the blades 400. The definition is: the adjustment accuracy of the drive mechanism 230 driving the blades 400 via the planetary gear synchronization mechanism 220 is A, and the adjustment accuracy of the drive member 210 driving the blades 400 via the planetary gear synchronization mechanism 220 is B. Then, A>B. In this embodiment, by providing the drive mechanism 230 and ensuring that the adjustment accuracy of the drive mechanism 230 driving the blades 400 is greater than the adjustment accuracy of the drive member 210 driving the blades 400, the adjustment accuracy of the adjustment assembly 200 driving the blades 400 can be improved. By providing a multi-stage adjustment mechanism, this blade self-adjusting structure can improve the adjustment accuracy of the adjustment assembly 200 driving the blades 400 to adjust the pitch angle of the blades 400, while also increasing the adjustment speed. Specifically, when the blade 400 needs to be driven to rotate at a large angle, the blade 400 is driven to rotate by the driving member 210; when the blade 400 needs to be driven to rotate at a small angle, the blade 400 is driven to rotate by the driving mechanism 230. It should be noted that the large angle mentioned above refers to a rotation angle greater than 5°, and the small angle refers to a rotation angle less than 5°.

[0042] See also Figure 3In one embodiment of the present invention, drive mechanism 230 includes a drive body, a turbine 231, a worm 232, a mounting block 233, and a self-locking unit 234. The drive body is mounted on mounting plate 110. Turbine 231 is rotatably mounted on mounting plate 110 via a second rotating shaft 2311. Worm 232 is disposed at the output end of the drive body and meshes with turbine 231. Mounting block 233 is disposed on second rotating shaft 2311. Self-locking unit 234 is disposed on mounting block 233. A portion of self-locking unit 234 can be inserted into sun gear 222 to lock the relative position between sun gear 222 and mounting block 233. In this embodiment, the drive body indirectly drives turbine 231 to rotate via worm 232, thereby driving sun gear 222 to rotate. This reduces the rotation speed of sun gear 222, thereby reducing the rotation speed of blades 400 and improving adjustment accuracy. The self-locking unit 234 can lock the relative position of the sun gear 222 and the mounting block 233, so that the sun gear 222 rotates along with the mounting block 233, and can release the position lock of the sun gear 222 and the mounting block 233, so that the sun gear 222 and the mounting block 233 are separated. Specifically, when it is necessary to drive the blades 400 to rotate at a large angle, the self-locking unit 234 releases the position lock of the sun gear 222 and the mounting block 233. At this time, the driving member 210 drives the sun gear 222 to rotate, and then drives the blades 400 to rotate through the planetary gears 224 and the planetary carrier 223. During this process, the driving member 210 can drive the blades 400 to rotate rapidly to increase the adjustment speed; when it is necessary to drive the blades 400 to rotate at a small angle, the self-locking unit 234 locks the relative position of the sun gear 222 and the mounting block 233. At this time, the driving body can indirectly drive the sun gear 222 to rotate through the worm 232, and then drive the blades 400 to rotate through the planetary gears 224 and the planetary carrier 223. During this process, the driving body can drive the blades 400 to rotate slowly to improve the adjustment accuracy. In a specific embodiment, the driving member 210 and the driving body can both be drive motors. To prevent the driving member 210 from being damaged when the driving body drives the blades 400 to rotate, the driving member 210 can use a magnetic coupling coupling for transmission.

[0043] See also Figure 3In one embodiment of the present invention, the mounting block 233 is provided with a receiving hole 2331, and the sun gear 222 is provided with a pin hole 2222. The self-locking unit 234 includes an electromagnet 2341 and an insert block 2342. Both the electromagnet 2341 and the insert block 2342 are received in the receiving hole 2331, and the electromagnet 2341 can drive the insert block 2342 to be inserted into or removed from the pin hole 2222. A controller can de-energize the electromagnet 2341 to insert the insert block 2342 into the pin hole 2222, and can also energize the electromagnet 2341 to remove the insert block 2342 from the pin hole 2222. In this embodiment, by de-energizing and energizing the electromagnet 2341 to insert the insert block 2342 into the pin hole 2222, the sun gear 222 and the mounting block 233 are locked and unlocked. This embodiment has the characteristics of a simple structure and easy manufacturing, which can reduce the manufacturing difficulty of the blade self-adjusting structure. Specifically, when it is necessary to drive the blade 400 to rotate at a large angle, the controller controls the electromagnet 2341 to be energized so that the plug 2342 is disengaged from the pin hole 2222; when it is necessary to drive the blade 400 to rotate at a small angle, the controller controls the electromagnet 2341 to be de-energized so that the plug 2342 is inserted into the pin hole 2222.

[0044] See also Figure 3 In one embodiment of the present invention, the self-locking unit 234 further includes a reset member 2343 disposed outside the electromagnet 2341. One end of the reset member 2343 is connected to the bottom surface of the receiving hole 2331, and the other end is connected to the insert block 2342. The reset member 2343 is capable of driving the insert block 2342 away from the electromagnet 2341 to insert into the pin hole 2222. In this embodiment, the reset member 2343 is used to drive the insert block 2342 away from the electromagnet 2341 to insert into the pin hole 2222. This allows the insert block 2342 to automatically insert into the pin hole 2222, thereby reducing the difficulty of the self-locking unit 2344 in locking the relative position of the sun gear 222 and the mounting block 233. Specifically, when the blade 400 changes from rotating at a large angle to rotating at a small angle, that is, when the blade 400 changes from being driven by the driver 210 to being driven by the driver body, the controller controls the electromagnet 2341 to lose power, and the plug 2342, driven by the reset member 2343, moves in a direction away from the electromagnet 2341 and abuts against the sun gear 222 until the plug 2342 is aligned with the pin hole 2222, at which point the plug 2342 automatically inserts into the pin hole 2222. It should be noted that to ensure that the plug 2342 can slide on the end face of the sun gear 222, the end face of the sun gear 222 should be designed as a flat surface or a slot should be provided at the position of the sun gear 222 corresponding to the plug 2342.

[0045] In addition, a position detector for detecting the position of the pin hole 2222 can be provided at the position of the mounting block 233 corresponding to the pin hole 2222 or on the insert block 2342 to ensure that the insert block 2342 is accurately inserted into the pin hole 2222. Specifically, when the blade 400 switches from a large-angle rotation to a small-angle rotation, the sun gear 222 gradually stops rotating due to a loss of power. After the sun gear 222 stops rotating, the drive body drives the turbine 231 to rotate via the worm 232, thereby driving the mounting block 233 to rotate until the position detector detects the pin hole 2222. The drive body stops operating, and the controller controls the electromagnet 2341 to de-energize. The insert block 2342 is then driven by the reset member 2343 to move away from the electromagnet 2341 and insert into the pin hole 2222. The drive body is then restarted to drive the blade 400 to a small-angle rotation. In one specific embodiment, the reset member 2343 can be a coil spring.

[0046] In another embodiment of the present invention, the planetary gear synchronization mechanism 220 includes a ring gear 221, a sun gear 222, a planet carrier 223 and at least two planetary gears 224, the sun gear 222 is arranged on the hub 100; the ring gear 221 is movably arranged on the hub 100, and is connected to the output end of the driving member 210 by gear meshing, and each planetary gear 224 is simultaneously meshed with the outer tooth surface of the sun gear 222 and the inner tooth surface of the ring gear 221, the planet carrier 223 is rotatably connected to each planetary gear 224, and the planet carrier 223 is provided with bevel teeth 2231, each blade 400 is provided with a bevel gear 410, and each bevel gear 410 is meshed with the bevel teeth 2231. Specifically, the driving member 210 drives the sun gear 222 to rotate via the first rotating shaft 2221. Since the ring gear 221 is fixedly mounted to the hub 100, the planetary gears 224 will simultaneously rotate around the sun gear 222, driving the planetary carrier 223 to rotate. Subsequently, the planetary carrier 223 will drive the blades 400 to rotate, thereby adjusting the pitch angle of the blades 400. It should be noted that when designing the planetary gear synchronization mechanism 220, the planetary gear synchronization mechanism 220 should be designed to reduce the output speed, that is, the speed at the output end is smaller than the speed at the input end. This can improve the stability when adjusting the pitch angle of the blades 400.

[0047] In another embodiment of the present invention, the sensor module includes at least one of a strain gauge and an anemometer. In this embodiment, the strain gauge is used to detect deformation of the surface of the blade 400 to measure the stress on the blade 400; the anemometer is used to measure wind speed.

[0048] The present invention also proposes a wind power generation equipment, which includes a blade self-adjusting structure of the wind power generation equipment. The specific structure of the blade self-adjusting structure of the wind power generation equipment refers to the above-mentioned embodiment. Since the wind power generation equipment adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0049] The present invention further provides a control method for the blade self-adjusting structure of the above-mentioned wind power generation equipment, comprising:

[0050] S100, acquiring detection data from the sensor module, the detection data including stress on the blade 400 and real-time wind speed;

[0051] S200: The controller obtains the detection data and calculates the optimal pitch angle according to a preset optimal pitch angle calculation formula; the preset optimal pitch angle calculation formula is:

[0052] θ=k1·v 2 +k2·∈+C

[0053] Wherein, θ is the optimal pitch angle, v is the real-time wind speed, ∈ is the stress on the blade 400, k1 and k2 are calibration coefficients, and C is the environmental compensation coefficient.

[0054] S300 , the controller controls the driving member 210 and the driving body to operate, driving each blade 400 to rotate synchronously to an optimal pitch angle.

[0055] Specifically, the controller acquires detection data from the sensor module and calculates the optimal pitch angle according to a preset optimal pitch angle calculation formula. This allows the controller to control the operation of the drive element 210 and the drive body, driving each blade 400 to rotate synchronously to the optimal pitch angle. In the above formula, k1 is the wind speed weight coefficient, which reflects the degree of influence of wind speed on pitch angle adjustment. Specifically, k1 is obtained by fitting a quadratic curve to the optimal pitch angle corresponding to different wind speeds under controllable wind speed. The value range of k1 is -0.05 to -0.01. k2 is the strain weight coefficient, which reflects the sensitivity of the mechanical load of the blade 400 to adjustment. Specifically, k2 is obtained by attaching strain gauges at key locations on the blade 400, applying a known load, and recording the corresponding relationship between the stress on the blade 400 and the safe pitch angle. The value range of k2 is 0.5 to 2.0. C is the environmental compensation coefficient, which can correct the influence of non-ideal environmental factors (such as air density, temperature, and altitude) on the pitch angle. It is mainly fitted with the functional relationship between C and environmental parameters through high and low temperature experiments and tests at different altitudes.

[0056] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the scope of protection of the present invention.

Claims

1. A blade self-adjusting structure for a wind power generation device, characterized in that: include: wheel hub; at least three blades, each blade being rotatably disposed on the hub, and each blade being provided with a sensor module; An adjusting assembly, the adjusting assembly comprising a driving member and a planetary gear synchronization mechanism, the driving member being disposed on the wheel hub; the planetary gear synchronization mechanism being disposed on the wheel hub and connected to an output end of the driving member; A controller is used to obtain detection data from the sensor module and control the operation of the driving member according to the detection data. The driving member drives each of the blades to rotate synchronously through the planetary gear synchronization mechanism to adjust the pitch angle of each blade.

2. The blade self-adjusting structure of a wind power generation device according to claim 1, characterized in that: The planetary gear synchronization mechanism includes a ring gear, a sun gear, a planet carrier and at least two planetary gears, the ring gear is arranged on the wheel hub, the sun gear is arranged in the ring gear and is connected to the output end of the driving member through a first rotating shaft, each of the planetary gears is simultaneously engaged with the outer tooth surface of the sun gear and the inner tooth surface of the ring gear, the planet carrier is rotatably connected to each of the planetary gears, and the planet carrier is provided with conical teeth, each of the blades is provided with a bevel gear, and each of the bevel gears is engaged with the conical teeth.

3. The blade self-adjusting structure of the wind power generation equipment according to claim 2, characterized in that: There are three planetary gears, and the three planetary gears are simultaneously engaged with the outer tooth surface of the sun gear and the inner tooth surface of the ring gear.

4. The blade self-adjusting structure of a wind power generation device according to claim 2, characterized in that: The adjustment assembly further includes a driving mechanism, the hub is provided with a mounting plate, the driving mechanism is arranged on the mounting plate, and the driving mechanism can drive the blade to rotate through the planetary gear synchronization mechanism to adjust the pitch angle of the blade; Definition: The adjustment accuracy of the driving mechanism driving the blades to rotate through the planetary gear synchronization mechanism is A, and the adjustment accuracy of the driving member driving the blades to rotate through the planetary gear synchronization mechanism is B, then: A>B.

5. The blade self-adjusting structure of the wind power generation equipment according to claim 4, characterized in that: The driving mechanism includes a driving body, a turbine, a worm, a mounting block and a self-locking unit, the driving body is arranged on the mounting plate, the turbine is rotatably arranged on the mounting plate through a second rotating shaft, the worm is arranged at the output end of the driving body and engages with the turbine, the mounting block is arranged on the second rotating shaft, and the self-locking unit is arranged on the mounting block; a portion of the self-locking unit can be inserted into the sun gear to lock the relative position of the sun gear and the mounting block.

6. The blade self-adjusting structure of the wind power generation equipment according to claim 5, characterized in that: The mounting block is provided with a receiving hole, the sun gear is provided with a pin hole, the self-locking unit comprises an electromagnet and an insert block, the electromagnet and the insert block are both accommodated in the receiving hole, and the electromagnet can drive the insert block to be inserted into or detached from the pin hole; The controller can control the electromagnet to lose power so that the insert block is inserted into the pin hole; the controller can also control the electromagnet to gain power so that the insert block is separated from the pin hole.

7. The blade self-adjusting structure of a wind power generation device according to claim 6, characterized in that: The self-locking unit also includes a reset member arranged on the outside of the electromagnet; one end of the reset member is connected to the bottom surface of the accommodating hole, and the other end is connected to the insertion block, and the reset member can drive the insertion block to move in a direction away from the electromagnet to be inserted into the pin hole.

8. The blade self-adjusting structure of a wind power generation device according to claim 1, characterized in that: The planetary gear synchronization mechanism includes a ring gear, a sun gear, a planet carrier and at least two planetary gears, the sun gear is arranged on the wheel hub; the ring gear is movably arranged on the wheel hub and is connected to the output end of the driving member by gear meshing, each of the planetary gears is simultaneously meshed with the outer tooth surface of the sun gear and the inner tooth surface of the ring gear, the planet carrier is rotatably connected to each of the planetary gears, and the planet carrier is provided with conical teeth, each of the blades is provided with a bevel gear, and each of the bevel gears is meshed with the conical teeth.

9. The blade self-adjusting structure of a wind power generation device according to claim 1, characterized in that: The sensor module includes at least one of a strain gauge and an anemometer.

10. A wind power generation device, characterized in that: The invention comprises the blade self-adjusting structure of the wind power generation equipment according to any one of claims 1 to 9.

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